matkov said:Some explanatory video on youtube would be even better.
There are tons already.
Look at these one from Maretti:
https://www.youtube.com/watch?v=XJzQ8DXrgcY&hd=1
But a better way to do it would be to create an account on Twitch at look two or three games from the WT.
One interesting trick about chainning is what is called "Poor Man's Town Portal". Works like these.
1. You leave you main with just a few losy troops (a gremlin if u have tactics...)
2. Attack some neutrals and retreat.
3. Buy the main in the town closest to the point where you want him.
4. Chain the army from where he was to where he is now.
This can save your ass if you initial town area is invaded when your main is far away and no other heroes will be able to deal with the thread.
P.S. Didn't notice the thread was created before Twitch or Maretti's posts...